#include <stdio.h>
#include <stdlib.h>

struct Contact {
	int id;
	char name[10];
};


int main(){
  struct Contact a = {1, "mary"};
  printf("%d, %s\n", a.id, a.name);

  struct Contact b = a;
  printf("%d, %s\n", b.id, b.name);

  // b.id = 111;
  // printf("%d, %s\n", a.id, a.name);
  // printf("%d, %s\n", b.id, b.name);

  // a.id = 111;
  // printf("%d, %s\n", a.id, a.name);
  // printf("%d, %s\n", b.id, b.name);

  return 0;
}